How did the geography of Greece help Greece in maintaining power?
Throughout Greece's history, it's geographical location has been a double-edged sword—a blessing as well as a curse. Greece's geography was particularly helpful in helping it obtain and maintain power thanks to its rugged topography and its easy access to the sea.
This prime location helped Athens become a power in the Ancient world. Thanks to the fact that it was protected on all sides from potential foes, Athens became the first advanced civilization in the West. Likewise, the access to the Mediterranean Sea allowed Greece's commerce to flourish.
On the other hand, one of the difficulties that stemmed from Greece's location was the fact that it was on the tip of the Balkan Peninsula—a practically impassable area. Because of this, Greece was forced to rely solely on the Mediterranean Sea for communication and commerce, with few other options.